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Physical & Chemical properties

Boiling point

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Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
19/10/2012
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
Remarks:
Non-GLP study according to methodology comparable to international guideline (OECD guideline 103).
Reason / purpose:
reference to same study
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
Principles of method if other than guideline:
200 ml (178.0 g) of sample were heated by means of a hemispherical heating mantle. Bottom and head temperatures and amount of distillate were read and correlated to the distillation time to develop a distillation curve diagram. Samples were stored in full bottles at room temperature prior to testing.
GLP compliance:
no
Type of method:
distillation method
Key result
Boiling pt.:
101 °C
Atm. press.:
1 013 hPa
Remarks on result:
other: Standard deviation: +/- 10ºC

Distillation curve:

Time (Mins)

Bottom Temperature ('C)

Head Temperature ('C)

Amount of Distillate (g)

Amount of Distillate (%)

Comments

0

22

23.0

0.00

0.00

 

4

40

23.0

0.00

0.00

 

9

70

23.0

0.00

0.00

 

14

92

23.0

0.00

0.00

 

20

128

23.0

0.00

0.00

 

21

133

23.0

0.00

0.00

 

22

138

23.0

0.00

0.00

 

23

143

23.0

0.00

0.00

Starts boiling 

24

148

23.0

0.00

0.00

 

25

152

23.0

0.00

0.00

 

26

156

23.0

0.00

0.00

 

27

159

23.0

0.00

0.00

 

28

162

23.0

0.00

0.00

 

29

167

23.0

0.00

0.00

 

30

172

23.0

0.00

0.00

 

31

175

23.0

0.00

0.00

 

32

178

23.0

0.00

0.00

 

33

183

30.0

0.00

0.00

 

34

185

75.0

0.00

0.00

 

35

194

83.0

0.00

0.00

 

36

200

92.0

0.00

0.00

 

37

206

94.0

0.00

0.00

 

38

211

101.0

0.41

0.23

 First distillate

39

215

102.0

0.75

0.42

 

40

217

135.0

1.55

0.87

 

41

219

182.0

6.70

3.75

 

42

222

190.0

39.10

21.89

 

43

224

192.0

49.16

27.53

 

44

226

195.0

57.60

32.25

 

45

230

201.0

69.77

39.06

 

46

233

207.0

80.06

44.83

 

47

235

212.0

92.12

51.58

 

48

236

217.0

103.72

58.07

 

49

237

220.0

114.95

64.36

 

50

238

222.0

127.61

71.45

 

51

238

223.0

138.28

77.42

 

52

239

224.0

147.39

82.53

 End distillation

·        The sample started to boil at a bottom temperature of 143°c

·        First distillate was obtained at (head temperature) 101°c

·        Head temperature reached a plateau around 224°c

·        Bottom temperature continued to rise due to composition change.

Conclusions:
The boiling point of spearmint oil (Mentha spicata) is 101ºC at 1013 hPa.
Executive summary:

The boiling point of spearmint oil (Mentha spicata) was determined according to methodology comparable to OECD guideline 103 using the distillation method. The boiling point (first distillate) was found to be 101 +/- 10ºC at 1013 hPa.

Description of key information

Boiling point: 101°C at 1013hPa

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
101 °C

Additional information

In a key study, the boiling point of Spearmint oil (Mentha spicata) was determined according to methodology comparable to OECD guideline 103 using the distillation method. The boiling point (first distillate) was found to be 101 +/- 10ºC at 1013 hPa. A supporting study with Spearmint oil (Mentha cardiaca) reported a boiling point of 105 +/- 10ºC at 1013 hPa.